login
(n!)!, n>0 (note that A000197 is the correct version of this sequence, with a(0) = 1, not 0).
0

%I #9 Jul 10 2022 08:20:59

%S 0,1,2,720,620448401733239439360000

%N (n!)!, n>0 (note that A000197 is the correct version of this sequence, with a(0) = 1, not 0).

%K nonn,easy

%O 0,3

%A _N. J. A. Sloane_.